A ViewContext holds the current state of an operation on a Viewport. More...

Classes
struct	GradientSymb
	Parameters defining a gradient fill. More...

struct	QVAliasMaterialId
	If one of the uv mapping modes, Directional Drape, Cubic, Spherical or Cylindrical is to be used for mapping a material to a non persistent element for draw purposes an application maintained Id is required for the qv material. More...

struct	MaterialUVDetailBase

struct	MaterialUVDetail
	Materials which use uv mapping modes Directional Drape, Cubic, Spherical and Cylindrical require additional element based information for their definition. More...

struct	ElemDisplayParams
	This structure holds all of the information about an element specifying the "displayable parameters" of the element. More...

struct	LineStyleSymb
	This structure contains options (modifications) that can be applied to existing line styles to change their appearance without changing the line style definition. More...

struct	ElemMatSymb
	DgnCore implements this class for setting/getting the Material and Symbology (ElemMatSymb) used to draw geometry. More...

struct	OvrMatSymb
	DgnCore implements this class to draw geometry using a symbology/material that is different from the cooked ElemMatSymb, i.e. More...

struct	IPointCloudDrawParams

struct	IDrawGeom
	DgnCore implements this interface to provide methods that draw geometry in either cached or non-cached contexts. More...

struct	IViewDraw
	DgnCore implements this interface to provide the display system for Viewports. More...

struct	ICachedDraw
	Begin/End announcements around cached drawing sequences. More...

struct	ClipVolumeOverrides

struct	ClipVolumeFlags
	Stores ClipVolume flags which are used by DynamicViewSettings. More...

struct	XAttributesHolder
	This class allows an application to extend certain MicroStation elements with XAttributes, the actual persistence of which is then managed by MicroStation. More...

struct	DynamicViewSettings
	This class has a collection of settings used by dynamic view to apply its clip volume. More...

struct	ViewContext

Macros
#define	SCREENING_Full 0.0

#define	SCREENING_None 100.0

Typedefs
typedef RefCountedPtr < GradientSymb >	GradientSymbPtr

typedef RefCountedPtr< struct QVAliasMaterialId >	QVAliasMaterialIdPtr

typedef RefCountedPtr< struct MaterialUVDetail >	MaterialUVDetailPtr

typedef bool(*	PFXAttributeFilter )(XAttributeHandlerId handlerId, UInt32 xAttrId)
	return true if the XAttributeHandlerId, id combination should be filtered out of the XAttributeChangeSet. More...

Enumerations
enum	DrawExpense { Medium = 1, High = 2 }

enum	FillDisplay { Never = 0, ByView = 1, Always = 2, Blanking = 3 }
	< Whether an element should be drawn with its internal area filled or not More...

enum	LineJoin { None = 0, Bevel = 1, Miter = 2, Round = 3 }

enum	LineCap { None = 0, Flat = 1, Square = 2, Round = 3, Triangle = 4 }

enum	RangeResult { Outside = -1, Overlap = 0, Inside = 1 }

enum	RasterFormat { RGBA = 0, BGRA = 1, RGB = 2, BGR = 3, Gray = 4, Alpha = 5, RGBS = 6, BGRS = 7 }

enum	OvrMatSymbFlags { MATSYMB_OVERRIDE_None = (0), MATSYMB_OVERRIDE_Color = (1<<0), MATSYMB_OVERRIDE_ColorTransparency = (1<<1), MATSYMB_OVERRIDE_FillColor = (1<<2) \| (1<<31), MATSYMB_OVERRIDE_FillColorTransparency = (1<<3), MATSYMB_OVERRIDE_RastWidth = (1<<4), MATSYMB_OVERRIDE_Style = (1<<5), MATSYMB_OVERRIDE_TrueWidth = (1<<6), MATSYMB_OVERRIDE_ExtSymb = (1<<7), MATSYMB_OVERRIDE_RenderMaterial = (1<<8) }
	OvrMatSymb flags that determine which overrides are active. More...

enum	GeomRepresentations { DISPLAY_INFO_None = 0, DISPLAY_INFO_Edge = (1<<0), DISPLAY_INFO_Fill = (1<<1), DISPLAY_INFO_Surface = (1<<2), DISPLAY_INFO_Thickness = (1<<3), DISPLAY_INFO_Pattern = (1<<4) }
	// Bentley Systems More...

enum	FilterLODFlags { FILTER_LOD_Off = 0, FILTER_LOD_ShowRange = 1, FILTER_LOD_ShowNothing = 2 }

Detailed Description

A ViewContext holds the current state of an operation on a Viewport.

A ViewContext must be first attached to a Viewport to be useful, and must be detached from the Viewport to free any memory associated with its internal state.

MicroStation implements ViewContext on several types of objects, including:

UpdateContext - for repainting the content of a Viewport
RedrawContext - for re-displaying changed MSElementDescrs or ElementRefs in a viewport
RangeContext - for caclulating the range of an element
PickContext - for choosing elements within a proximity of a visible point
etc.

Each of these implementers of ViewContext hold different types of internal state depending on their purpose.

ViewContext provides services for traversing the appropriate elements in the relevant models associated with a Viewport and for maintaining the current:

local coordinate system
display path
view flags
display parameters
etc.

Macro Definition Documentation

#define SCREENING_Full 0.0

#define SCREENING_None 100.0

Typedef Documentation

typedef RefCountedPtr<GradientSymb> GradientSymbPtr

typedef RefCountedPtr<struct MaterialUVDetail> MaterialUVDetailPtr

typedef bool(* PFXAttributeFilter)(XAttributeHandlerId handlerId, UInt32 xAttrId)

return true if the XAttributeHandlerId, id combination should be filtered out of the XAttributeChangeSet.

typedef RefCountedPtr<struct QVAliasMaterialId> QVAliasMaterialIdPtr

Enumeration Type Documentation

enum DrawExpense

strong

Enumerator
Medium	Average for a element type that may be cached.
High	Cache it unless at risk of exhausting virtual address.

enum FillDisplay

strong

< Whether an element should be drawn with its internal area filled or not

Enumerator
Never	Don't fill, even if fill attribute is on for the viewport.
ByView	Fill the element if the fill attribute is on for the viewport.
Always	Always fill the element, even if the fill attribute is off for the viewport.
Blanking	Always fill/always behind other geometry. Only applicable to geometry within a single QvElem.

enum FilterLODFlags

Enumerator
FILTER_LOD_Off	don't do Level-of-detail filtering at all
FILTER_LOD_ShowRange	when too small, just show range
FILTER_LOD_ShowNothing	when too small, show nothing

enum GeomRepresentations

*//* Bentley Systems

Enumerator
DISPLAY_INFO_None	Don't draw anything (not renderable, i.e. has no surface, and option to render wires is off)
DISPLAY_INFO_Edge	Output wireframe geometry, i.e. outline curves and surface/solid edges/isoparametrics suitable for snapping.
DISPLAY_INFO_Fill	Output closed curves and regions as filled.
DISPLAY_INFO_Surface	Output surface/solid representation.
DISPLAY_INFO_Thickness	Output open/closed curves as extruded surfaces/solids.
DISPLAY_INFO_Pattern	Output closed curves and regions as hatched/patterned.

enum LineCap

strong

Enumerator
None
Flat
Square
Round
Triangle

enum LineJoin

strong

Enumerator
None
Bevel
Miter
Round

enum OvrMatSymbFlags

OvrMatSymb flags that determine which overrides are active.

flags to indicate the parts of a MatSymb that are to be overridden

Enumerator
MATSYMB_OVERRIDE_None	no overrides
MATSYMB_OVERRIDE_Color	override outline color
MATSYMB_OVERRIDE_ColorTransparency	override outline color transparency
MATSYMB_OVERRIDE_FillColor	override fill color, override blanking fill with bg color
MATSYMB_OVERRIDE_FillColorTransparency	override fill color transparency
MATSYMB_OVERRIDE_RastWidth	override raster width
MATSYMB_OVERRIDE_Style	override style
MATSYMB_OVERRIDE_TrueWidth	override true width
MATSYMB_OVERRIDE_ExtSymb	override extended symbology
MATSYMB_OVERRIDE_RenderMaterial	override render material

enum RangeResult

strong

Enumerator
Outside
Overlap
Inside

enum RasterFormat

strong

Enumerator
RGBA
BGRA
RGB
BGR
Gray
Alpha
RGBS
BGRS

Classes

Macros

Typedefs

Enumerations

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation